- Study measured seven different drivers during their normal weekly driving, doing over 2,000km between them
- Even in the case of long distance commuters the cars were in zero emissions mode (ZEV) for over 50% of the time and for over 30% of the distance covered
- For city centre commuting over 75% of the time and over 50% of the distance was in ZEV mode
- The three drivers with the longest commutes had the best fuel economy, averaging almost 60 mpg.
A new study carried out by University College Dublin (UCD) academics, which was published today, has revealed that in typical Irish commuting conditions, Toyota’s hybrid powertrain system drives in zero emissions mode (ZEV) for significantly more than half (62%) of the time and over 40% of the distance covered.
Those were the key findings of a study carried out by four UCD academics and commissioned by Toyota Ireland through ConsultUCD, the University’s managed consultancy service. The study entitled "Energy Behaviour of Toyota Prius Hybrid Vehicles in Sample Irish Commuting Conditions" was authored by Professors Robert Shorten and Giovanni Russo, UCD School of Electrical and Electronic Engineering, Professor Franceso Pilla, UCD School of Architecture, Planning and Environmental Planning and Professor David Timoney, UCD School of Mechanical and Materials Engineering.
Zero emissions mode describes the time the internal combustion engine is not running and the vehicle is therefore emitting no pollutants. The longer the car is in ZEV mode the more significant the air quality benefits for other road users
The study tracked seven drivers who commuted to UCD, Belfield from Drogheda, Wicklow, Aughrim, Smithfield, Blackrock and Dundrum (2), over a full week each during last November, combined with normal additional family driving. Conclusions are based on the analysis of the more than 2,000 kilometres of driving across motorways, rural roads and city driving that resulted.
The routes reflect typical Irish commuting conditions. The researchers measured the time the cars spent in zero emissions mode versus internal combustion mode. No restrictions or driving guidelines were given to the drivers.